\begin{table}%t1 %\centering \par \caption{\label{tab:focal_plane}Geometric parameters for the LFI focal plane.} \par \begin{tabular}{ccccrrr} \hline \hline\noalign{\smallskip} \multicolumn{2}{c}{Horn} & Band & $\rho$\tablefootmark{a} & $\phi$\tablefootmark{b} & \multicolumn{2}{c}{$\psi$\tablefootmark{c}} \\ Lead & Trail & & & & Side & Main \\ \hline LFI-18 & LFI-23 & 70~GHz & $87\fdg20$ & $2\fdg46$ & $-$$22\fdg03$ & $67\fdg67$ \\ LFI-19 & LFI-22 & 70~GHz & $87\fdg77$ & $1\fdg55$ & $-$$22\fdg30$ & $67\fdg70$ \\ LFI-20 & LFI-21 & 70~GHz & $88\fdg10$ & $0\fdg63$ & $-$$22\fdg36$ & $67\fdg74$ \\ \multicolumn{2}{c}{LFI-24} & 44~GHz & $89\fdg05$ & $0\fdg00$ & $0\fdg00$ & $90\fdg00$ \\ LFI-26 & LFI-25 & 44~GHz & $82\fdg59$ & $4\fdg43$ &$-$$112\fdg52$ &$-$$23\fdg32$ \\ LFI-28 & LFI-27 & 30~GHz & $88\fdg90$ & $1\fdg93$ & $-$$22\fdg20$ & $67\fdg50$ \\ \hline \end{tabular} \tablefoot{\tablefoottext{a}{Scan circle radius (ZS co-latitude);} \tablefoottext{b}{phase along scan circle (ZS longitude);} \tablefoottext{c}{polarisation orientation relative to ZS meridians (See Fig.~\ref{fig:scan_geom}), using the astronomical sign convention (positive from north to east). Note that the $\psi_{\rm MB}$ listed by \citet{PLP_M5} use a different geometrical definition.} We only quote parameters for the leading horn in each matched pair: the values of $\phi$ and $\psi$ for the trailing horn are the negatives of those quoted.} \end{table}